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Comparison of Non-Resonant and Super-Resonant Dual-Active ZVS-Operated High-Power DC/DC Converters
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| Author(s) |
Robert LENKE, Florian MURA, Rik W. DE DONCKER |
| Abstract |
Two bi-directional high-power dc-dc converter topologies with zero-voltage-switching (ZVS) operation over a defined load range are compared. These are the non-resonant dual-active bridge (DAB) and the dual-active series-resonant converter (DSRC) in super-resonant mode. A unified mathematical model describing both converters is presented, which treats the DAB as a boundary case of the super-resonant DSRC with infinite capacitance. It bases on a modification of an existing analytical analysis of the DSRC. Using the model, a method is developed to optimize the ac link transformer size for a limited dynamic voltage operating range with constant power capability, suitable for high-power converters in utility applications. The influence of the resonant capacitor on transformer size and other vital converter characteristics is quantitatively evaluated. |
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| Filename: | 0516-epe2009-full-16275530.pdf |
| Filesize: | 1.327 MB |
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| Type |
Members Only |
| Date |
Last modified 2010-01-27 by System |
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